Antenna structure



FIG. 1 is a perspective view of a first embodiment of an antennastructure showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a rear elevation view thereof; and

FIG. 7 is a bottom plan view thereof.

FIG. 8 is a perspective view of a second embodiment of an antennastructure showing my new design;

FIG. 9 is a top plan view thereof;

FIG. 10 is a left side elevation view thereof;

FIG. 11 is a front elevation view thereof;

FIG. 12 is a right side elevation view thereof;

FIG. 13 is a rear elevation view thereof; and,

FIG. 14 is a bottom plan view thereof.

The ornamental design for an antenna structure, as shown and described.